Missing angular_velocity and linear_acceleration when simulating in LGSVL

[zhangyuh15]

Ubuntu 18.04
Apollo v6.0_edu
LGSVL linux64-2021.3

When simulating in LGSVL, the messages, angular_velocity and linear_acceleration in channel localization/pose, are all zeros.
However, the messages above are correct in the channel sensor/gnss/imu, not in the channel sensor/gnss/corrected_imu.
It also show that "Raw IMU message delay, which is usually 10 secend behind current time" in dreamviewer.

We need a way to obtain the linear accelearation and angular velocity through localization.estimate message, since it is necessary for the control component.